Formation of the Solar System

Our solar system consists of

As the distance between two objects increases, the force of gravity between them _________.

One complete trip along a planet or body's orbit is known as a(n)

This force causes the gas and dust in a nebula to stay together rather than drifting apart.

This can upset the balance between gravity and pressure in a nebula, causing globules to form

In the imaginary ellipse created by Earth's orbit, the sun would be found at a

The combination of the nuclei of small atoms to form a larger nucleus, releasing energy, is

As the mass of two objects increases, the force of gravity between them _________.

Our solar system is about this old.

After the young solar nebula began to collapse, creating a hot, dense center, this happened.

Isaac Newton determined that ______ was the force that kept the moon in orbit around the Earth.

For a planet's orbit, the semimajor axis would represent

A nebula is

The layer of the sun indicated by the yellow rectangle is the

Which of the following was never a theory for the source of the sun's energy production?

Day and night on earth are determined by earth's

The "c" in Einstein's famous equation, E=mc² stands for

The layer of the sun indicated by the yellow rectangle is the

The layer of the sun indicated by the yellow rectangle is the

Regions of extremely high temperature and brightness that develop on the sun's surface are

The outer planets are

The layer of the sun indicated by the yellow rectangle is the

Objects stay in orbit because of a balance between

The inner planets are

Kepler's 2nd law of planetary motion states that

The layer of the sun indicated by the yellow rectangle is the

Nuclear fusion in the sun's core involves

From smallest to largest, the order of particles formed in the process of accretion.

The area swept out when the planet moved from P₁ to P₂ is ______ that from P₃ to P₄.

Kepler's first law of planetary motion says that

The path a body follows as it travels around another body in space is known as a(n)

The part of the ellipse drawn in red is the

The spinning of a planet, or body, on its axis is known as

A measure of the average kinetic energy (energy of motion) of the particles in an object is

The following formula expresses Kepler's third law.

According to Kepler's third law of planetary motion, Mars travels __________Earth.

Einstein's famous equation, E=mc², can be summarized by saying

The looping phenomenon shown here is known as a

The speed of the planet from P₁ to P₂ is ________ it's speed from P₃ to P₄.

This outward force keeps a nebula from collapsing on itself.

Sunspots are cool dark areas that form in this layer of the sun

The layer of the sun indicated by the yellow rectangle is the